SyFy talks to Wyck Godfrey

"The first day of shooting in Brazil, Rob and Kristen's pictures got taken everywhere. And overwhelmingly the response was, 'Oh my gosh! His hair is too dark! His hair is black! What did they do? His hair is too black!' And it literally forced us to go in the next day and look at him and go, 'Did we go too dark with his hair? Should we lighten it a little bit?' And I think we ended up lightening it . . . Also, you've read all the blogs about the books by the time you're making the movies. So, in some way all that is subconsciously affecting your decisions as you're working on the adaptations of the scripts. I know that numerous times we'll be in a room talking about the script and someone will go, 'No, No! That's one fo the fans' favorite scenes! WE have to do that!'"

Source: pattinsonladies
Via twilighish , twilightexaminer